Formation of terephthalamide polymer of 5-methyl-1,9-nonanediami

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof

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528336, 528348, 528349, C08G 6928

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active

041873718

ABSTRACT:
Terephthalic acid and either 5-methyl-1,9-nonanediamine or an isomeric mixture of 5-methyl-1,9-nonanediamine with 2,4-dimethyl-1,8-octanediamine and/or 2,4,6-trimethyl-1,7-heptanediamine are admixed in a methanol/water medium, wherein the volume ratio of methanol to water is in the range of about 99:1 to about 80:20, and the weight ratio of terephthalic acid and diamine to the methanol/water medium is in the range of about 1:1 to about 1:3. The resulting slurry can be cooled to promote precipitation of the salt. The precipitated salt can be recovered by filtration and employed for the production of a polyamide.

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patent: 3563959 (1971-02-01), Schade et al.
patent: 3575935 (1971-04-01), Elam
patent: 3661982 (1972-05-01), Beswick
patent: 3904677 (1975-09-01), Campbell
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